Portfolio Jobs
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Full Stack Engineer
1Kosmos - BlockID
Software Engineering
Mumbai, Maharashtra, India
Posted on Feb 18, 2026
Job Description - Fullstack Engineer
As a Full Stack Engineer, you will design, build, and enhance our authentication and ID-proofing systems, delivering seamless
user experiences for our clients supported by robust and scalable backend implementations.
In this role, you'll be responsible for front-end and back-end development, integrating various technologies to build robust
applications. Your contributions will directly impact how we help enterprises secure and verify identities. We are looking for
someone who is passionate about coding, enjoys problem-solving, and thrives in a collaborative environment
Experience Level: 4 - 7 yrs
Skillset Required: NodeJS, React, Java or Golang, ExpressJS, Mongo DB, knowledge of any of the cloud platform like
AWS, GCP or Azure.
Key Responsibilities
• Design and develop scalable web applications using modern JavaScript frameworks (React) for front-end
solutions.
• Own the design, development, and maintenance of RESTful APIs and microservices using Node.js as the primary
technology, with support for Java or Go as needed.
• Work closely with designers to translate wireframes and figma prototypes into functional, user-friendly web
applications, ensuring optimal user experience.
• Maintain high code quality throughout the development process.
• Collaborate closely with product teams to define feature specifications and translate them into technical
requirements.
• Handle customer escalations, diagnose and resolve production issues.
• Work in an Agile environment, participating in code reviews, sprint planning, and regular stand-ups.
• Build and maintain databases, ensuring data integrity, security, and performance optimization.
• Integrate third-party services and APIs to enhance application functionality.
• Monitor application performance and troubleshoot issues, optimizing system performance as necessary.
Required Skills and Experience
• Bachelor’s degree in computer science or a related field, or equivalent experience.
• 4+ years of experience in full-stack development.
• Proficient in modern front-end technologies (HTML, CSS, JavaScript) and frameworks (React).
• Strong experience in back-end development using technologies such as Node.js, Java, or Go.
• Experience creating and consuming RESTful APIs and microservices architecture.
• Knowledge of database technologies, both SQL (PostgreSQL, MySQL) and NoSQL (MongoDB).
• Familiarity with version control systems (Git) and CI/CD practices.
• Experience with cloud platforms (AWS, Azure, or GCP) for deployment and scaling.
• Strong problem-solving skills, ability to troubleshoot issues, and an eagerness to learn new technologies.
• Excellent communication skills and a team-oriented mindset.
• Experience working in an Agile/Scrum environment.